Total lunar eclipse at totality, January 2019. A total lunar eclipse occurs when the Earth moves between the Sun and the Moon. At totality, the light from the Moon (sunlight reflected from the Moon after passing through the Earth's atmosphere) turns orange due to shorter wavelengths, such as blue light, being scattered more in Earth's atmosphere than longer wavelengths, such as red light. This eclipse took around 5 hours, with totality lasting for just over an hour. Photographed on 21 January 2019, from Mina de Sao Domingos, Portugal.